Why is my shifter rubbery after everything's warmed up?

[firefly]

My shifter gets rubbery at times. The weird thing is it happens when my transmission has been warmed up. I do 30 mins of highway driving everyday and right after I get off the highway I get the rubbery feeling. It returns to normal after the tranny has cooled off.

So far my tranny related mods:

*Redline MT90 fluid
*TWM short shifter
*Kartboy bushings
*Everything torqued to spec according to Mazda service manual.

Any thoughts?

 

[firefly]

No one?